Ring mounted multiple tube oscillator



May 13, 1952 R P 2,596,163

RING MOUNTED MULTIPLE TUBE OSCILLATOR Original Filed Nov. 20, 1942 Patented May 13, 1952 r 2,596,163

FPA'TQE'NFI UFFTIGE RING MOUN TED MULTIPLE TUBE *JO'SCILLATOR Robert Mi Page, Washington, "D'. C. floiitinuation of application Serial No. 466,289, November20, 1942. This application December 10; 1947; Serial No. 90,753

19 Claims. (013250- 36) "(Grantedr'under the actrofi Marchu3, i883,2as "amended-Apriltfl, 1928; 370 0. G. 757) This invention is a'continuationof my applica- Fig. 1 is a schematic circuit diagram of a'four ti'on] Serial No. 466,289jfi1ed November'20, 1942, 'tube oscillator embodyingthe-invention,

"now abandoned; and relates to am'ultiple tube -Figj 2 is' a schematic diagramof the output oscillator having its tubes mounted in a circle "circuit of the oscillator of Fig. 1', and

with their'longitudinal axes extending in mutual: Fig. 3 is a schematic diagram of-fithegrid cirparallelism. cuit of the-oscillator in a form employing tuned *In'radio frequency apparatus it is sometimes line inductances. "necessaryto generate and modulate more power Iii Fig. 1 are shown fouroscillator tubes I0, 1 I, {than "can be obtained from one or two oscillator i 12 and positionedtoconstitutea ring of tubes. tubes. -'While-'the disclosure-is restricted to an oscillator *In'apparatus-makinguse-of extremely short employing four tubes, it should'be understood recurring pulses of high frequency electromagthat -the-- arrangement shown and described is netio' wavesit is often necessary to produce such applicable to any 'even number of tubes greater "pulses at peak powerleyelswhich are unattain- *tharr four.

"able-by the use of oscillators employing only one 1 "-The anodes-of'thesetubes are shown connected or two oscillator tubes. to a common point I8 by leads, 15,- I6 and I7. '5 In such casesthe use of a plurality of oscillator "In practice the anodeshort cireuiting" means is "tubesgives riseto numerous difficulties. l preferably" a plate. --A conductor l9-connects Th'e'circuit should not" require that tubes be point 18 tdas'0urce of positive-high voltageor matched by' 'specialselection. The oscillator "toapul ser or'inodulator. Thegrids-areserially should respond faithfully to modulation potenconnected with an inductance interposed betialsas' does a corresponding one or two tube ostween the grids ofea-ch adjaoentpair. Theincillator. At the high voltages and frequencies at ductances may beinthiorm of coils as indicated "which'"such oscillators are employed 'it becomes inFig." rbyreference-numerals 20;'2|';"22and' 23, necessary to-maintain leads as short as possible" ortunedparallellines as shown at 14,0; 4!, '42 and "and'to provi'de' againstspark-over and corona f 43i1i'Figl 3, maybe employed.- From The center dis-charge throughout the assembly. In addition, "point 'ofcoil 22 inFig; .1; ortuned line il in Figi 3, the matching 'of the impedance of alarge numa conductor 24 leadsxto a grid keyento a-modulaber of tubes to that of a transmission line, instar, or ifa plate'keyeris'connectedto lead-l9 to troduces' a' further complication. Furthermore" ground-ithrough" a'resistor which "is not" shown. such apparatus isfrequeritly mounted in sea and 1'Each'bfthe'filaments' connected to ground air'borne vesselstin'which casespace and weight throughtun'ed reactances "consisting of con-ducconsiderations are highly important. torsin'dicated at25," '26, 21 and. 28. "These con- It is therefore an object of "this invention to "ductors constitute a'tuned "circuit; capacitive in 'provide' a 'multi-tube' oscillator-"Which 'overcomes fitsinet reactance," adjustment of which controls the abovementionedjdifiiculties. oscillator feed-back primar1ly,'. having a: second- Itiis anothenobj'ect" toi'provide amultitdbe ary effect on frequency. The'frequencyisrconoscillator assembly which'is' compact and simple trolledprim'arily "by"thetuning off the: grid cirin arrangement and which lends'itself readily to cuit. "For-tuningthelinductances of Fig. 3; shortthecoupling of its output circuit to a transmis 4o'ingbars 4415; Hand 41 are provided.

si'on line throu'ghthe use of a unitary coupling The actual physical arrangement'of thefilameans. 'me'nt leadsis" betterfshown in"Fig.'2. In'prac- Ttis; a furtherobject to provide a multitube ltice"thesdleztdsgare preferablyframemodssymoscillator in"wliich *theleads' are'short and the "metri'cally" arrangedin mutual?parallelism," as tubes closely arranged and yet danger of spark? 45 shown. ..The. leads "are"all"shortcirc'uited and over and coronais avoided. I rQ bY m? nsof a shorting-bar schemati- It is sun another objectof the invention to 'f can? nd ca t i *TT assumethe provide a multiple-tube oscillator .in which the form of a plate'which,*is slielable for varying the "tubes need not be matched by special selection, ffelectrical length-of the filament frame. 'An end and which will respond faithfully to modulation 'miplate 30 is secured to the ends of the frame rods potentials. 'forsuppoi'ting'purposes.

'Other objects will become apparent from a The frame rodsbfeach diagonallylocated pair careful consideration of the following description are connected in aplane norm'altoztheir axes and hen V vtaken together with "the accompany n .'--.'1ocated betweerfithe' n laments and-. the ishorting Fdrawingfin whichi" 'uabarhbyrai coiiplingu ar 'such.-iasl*if rdicated at 3! and 32. The intent is to divide the frame rods into two unitary sets, each composed of alternately located rods. Thus in an oscillator having six tubes, the filament frame rods will be connected into two unitary sets of three rods each. The load circuit has a connection to each of the two sets at the connecting bar, as illustrated by conductors 33 and 34.

While the disclosure has been confined to one embodiment of the invention, it will be apparent to those skilled in the art that many changes in form and arrangement may be made within the scope of the invention as defined by the appended claims.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes Without the payment of any royalties ring circuit.

2. A single-phase oscillator comprising an even number of electronic tubes each having a control grid, inductance means serially connecting said grids into a closed, direct current conducting ring circuit and means applying keying impulses to said ring circuit 3. An oscillator comprising an even number of electronic tubes, each having a control grid, and a plurality of tuned line sections serially connecting said grids into a closed, direct current conducting ring circuit.

4. An oscillator comprising an even number of electronic tubes, each having a control grid, a plurality of tuned line sections serially connecting said grids intoa closed, direct current conducting ring circuit, and means applying keying impulses to said ring circuit.

5. An oscillator comprising a plurality of electronic tubes, each having an anode and a control grid, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, and inductance means serially connecting said control grids into a closed, direct current conducting ring circuit.

6. An oscillator comprising a plurality of electronic tubes, each having an anode and a control grid, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, inductance means serially connecting said control grids into a closed, direct current conducting ring circuit andmeans applying keying impulsesto said ring circuit.

'7. An oscillator comprising a plurality of electronic tubes, each having an anode and a control grid, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, inductance means serially connecting said control grids into a closed,direct current conducting ring circuit and means applying keying impulses to said tubes.

8. An oscillator comprising a plurality of electronic tubes, each havingan anode and a control grid, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, direct current conducting tuned circuit means serially connecting said control grids into a closed, tuned ring circuit, and means applying keying pulses to said tuned circuit.

9. In an oscillator including akey-ing means, an even number ,ofoscillator tubes mounted in a circular arrangement, each of said tubes including anode, grid and filament electrodes, connections of low impedance to energy of the operating frequency between the anodesof all said tubes, means seriallyconnecting the grids of'said tubes, a rigid filament lead extending from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining them into a rigid structure, means short circuiting said filament leads in a plane normal to the axes thereof, means connecting said filament leads to the load of said oscillator, and means connecting said grid circuit to said keying means,

10. In an oscillator including a keying means; an even number of oscillator tubes mounted in a circular arrangement, each of said tubes including anode, grid and filament electrodes, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, means serially connecting the grids of said tubes, an inductance forming a part of said connecting means located between each two adjacent grids, a rigid filament lead extending from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining said leads into a rigid structure, means short-circuiting said filament the leads of the other, means connecting said keying means to said grid circuit and means connecting each of said group of leads to the load of said oscillator.

11. In an oscillator including a keying means, an even number of oscillator tubesmounted in a circular arrangement, each of saidtubes including anode, grid andfilament electrodes, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, means serially connecting the grids of said tubes, an inductance forming a part of' said connecting means located between each two adjacent grids, a rigid filament lead'extending from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining them into a rigid's'tructure, means short circuiting said filament leads in a plane normal to the axes thereof, means connecting said filament leads to the load of said oscillator, and means connecting said grid circuit to said keying means.

12. In an oscillator including a keying means, an even number of oscillator tubes mountcdin a circular arrangement, each of said tubes including anode, grid and filament electrodes, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, means serially connecting the grids of said tubes, a rigid filament lead extending from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining them into a rigid structure, means short circuiting said filament 7 leads in a plane normal to the axes thereof, means conductively connecting said filament leads into two unitary groups, the leads of each group being alternatively located with respect to the leads'of the other, means connecting said keying means to said grid circuit and means connecting each of said group of leads to the load of said oscillator. l3. In an oscillator including akeying means,

an even number of oscillator tubes mounted in a circular arrangement, each of said tubes including anode, grid and filament electrodes, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, means serially connecting the grids of said tubes, a rigid filament lead extending from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining them into a rigid structure, means short circuiting said filament leads in a plane normal to the axes thereof, means con necting said filament leads to the lead of said oscillator and means connecting said keying means to the anodes of said tubes.

14. In an oscillator including a keying means; an even number 01' oscillatortubes mounted in circular arrangement, each of said tubes including anode, grid and filament electrodes, connections of low impedance to energy of the operating frequency between the anodes'of all said tubes, means connecting said keying means to said anodes, means serially connecting the grids of said tubes, an inductance forming a part of said connecting means located between each two adiacent grids, a rigid filament lead extendin from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining said leads into a rigid structure, means short-circuiting said filament leads in a plane normal to the axes ofsaid leads, means conductively connecting said filament leads into two unitary groups, the leads of each group being alternatively located with respect to the leads of the other.

15. In an oscillator including a keying means, an even number of oscillator tubes mounted in a circular arrangement, each of said tubes including anode, grid and filament electrodes, connections of low impedance to energy of the operating frequency between the anodes of all said tubes, means connecting said keying means to said anodes, means serially connecting the grids of said tubes, an inductance forming a part of said connecting means located between each two adjacent grids, a rigid filament lead extending from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining them into a rigid structure, means short circuiting said filament leads in a plane normal to the axes thereof, and means connecting said filament leads to the load of said oscillator.

16. In an oscillator including a keying means, an even number of oscillator tubes mounted in a circular arrangement, each of said tubes including anode, grid and filament electrodes, connections of low impedance to energy of the operating frequency between the anodes of all said tubes. means connecting said keying means to said anodes, means serially connecting the grids of said tubes, a rigid filament lead extending from the filament of each of said tubes, means constraining said filament leads to extend in mutual parallelism and combining them into a rigid structure, means short circuiting said filament leads in a plane normal to the axes thereof, means conductively connecting said filament lead-s into two unitary groups, the leads of each group being alternatively located with respect to the leads of the other, and means connecting: each of said groups of leads to the load of said oscillator.

17. A multi-tube generator of radio frequency pulses comprising a plurality of pairs of vacuum tubes arranged symmetrically in a circle, and each having a filament, a grid and an anode, a tuned circuit connected in push-pull relation between the grids of each pair of tubes, a tuned circuit connected in push-pull relation between the filament of each tube of said pair and the filament of an adjacent tube of another pair, and connections of low impedance to energy of the operating frequency between the anodes of all said tubes. I 18. A multi-tube generator comprising a plurality of pairs of vacuum tubes arranged in a circle, each of said tubes having a filament, a grid and an anode, tuned circuits between the grids of said pairs of tubes for producing opposite instantaneous polarities on the grids of each pair of tubes, tuned circuits between the filaments of the tubes in difierent pairs for producing opposite instantaneous polarities on said filaments, connections of low impedance to energy of the operating frequency between the anodes of all of said tubes, and an output circuit coupled to said filament tuned circuits.

19. An oscillator comprising a plurality of tubes mounted in a ring, each of said tubes including plate, grid and filament electrodes, means interconnecting the plates of said tubes, means serially connecting the control grids of said tubes in a continuous circuit, a multi-conductor resonant circuit having a separate conductor for each of said tubes and means coupling said resonant circuit to the filaments of said tubes.

ROBERT M. PAGE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,934,523 Brown .1 Nov. '7, 1933 2,081,425 Fay May 25, 1937 2,181,568 Kotowski et al. Nov. 28, 1939 2,253,849 Dow Aug. 26, 1941 

